Categories Featured For Sale! 441 and 441 1/2 W Exchange St, Sycamore Source Continue reading For Sale! 441 and 441 1/2 W Exchange St, Sycamore at DeKalb County Online. Tags Castle View, DeKalb, Duplex, For Sale, Home for Sale, Local Business Feeds, Real Estate, Sycamore ← The Aloha Burger – May’s PJ’s Burger of the Month! → Did Facebook secretly collect Android data?